Surgical device

ABSTRACT

A surgical device is provided that includes a jaw portion with a first jaw and a second jaw moveable relative to the first jaw. The surgical device also includes a shaft portion coupled to a proximal end of the jaw portion. A driver is configured to cause relative movement of the jaw portion and the shaft portion. The driver may be configured to cause the jaw portion to pivot relative to the shaft portion about a pivot axis that is perpendicular to first and second longitudinal axes defined by the jaw portion and the shaft portion, respectively. The driver may also be configured to cause at least a portion of the jaw portion to rotate relative to the shaft portion about the first longitudinal axis. Advantageously, the surgical device includes a surgical member, e.g., a cutting element and/or a stapling element, disposed within the first jaw.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a Continuation Application claiming the benefit of and priority to U.S. application Ser. No. 11/191,851, filed Jul. 27, 2005 now U.S. Pat. No. 8,241,322, the entire content of which is expressly incorporated herein by reference.

U.S. application Ser. No. 11/191,851 expressly incorporates herein by reference each of the following in its entirety: U.S. patent application Ser. No. 60/388,644, filed on Jun. 14, 2002, now abandoned; U.S. patent application Ser. No. 10/460,291, filed on Jun. 11, 2003, now U.S. Pat. No. 7,743,960; U.S. patent application Ser. No. 09/999,546, filed on Nov. 30, 2001, now U.S. Pat. No. 7,695,485; U.S. patent application Ser. No. 09/887,789, filed on Jun. 22, 2001, now U.S. Pat. No. 7,032,798; U.S. patent application Ser. No. 09/836,781, filed on Apr. 17, 2001, now U.S. Pat. No. 6,981,941; U.S. patent application Ser. No. 09/723,715, filed on Nov. 28, 2000, now U.S. Pat. No. 6,793,652; U.S. patent application Ser. No. 09/324,451, filed on Jun. 2, 1999, now U.S. Pat. No. 6,315,184; U.S. patent application Ser. No. 09/324,452, filed on Jun. 2, 1999, now U.S. Pat. No. 6,443,973; U.S. patent application Ser. No. 09/351,534, filed on Jul. 12, 1999 now U.S. Pat. No. 6,264,087; U.S. patent application Ser. No. 09/510,923, filed on Feb. 22, 2000 now U.S. Pat. No. 6,517,565; and U.S. patent application Ser. No. 09/510,927, filed on Feb. 22, 2000 now U.S. Pat. No. 6,716,233.

FIELD OF THE INVENTION

The present invention relates to a surgical device. More specifically, the present invention relates to a powered, articulating device for clamping, cutting and stapling tissue.

BACKGROUND INFORMATION

One type of surgical device is a linear clamping, cutting and stapling device. Such a device may be employed in a surgical procedure to resect a cancerous or anomalous tissue from a gastro-intestinal tract. One conventional linear clamping, cutting and stapling instrument is shown in FIG. 1. The device includes a pistol grip-styled structure having an elongated shaft and distal portion. The distal portion includes a pair of scissors-styled gripping elements, which clamp the open ends of the colon closed. In this device, one of the two scissors-styled gripping elements, such as the anvil portion, moves or pivots relative to the overall structure, whereas the other gripping element remains fixed relative to the overall structure. The actuation of this scissoring device (the pivoting of the anvil portion) is controlled by a grip trigger maintained in the handle.

In addition to the scissoring device, the distal portion also includes a stapling mechanism. The fixed gripping element of the scissoring mechanism includes a staple cartridge receiving region and a mechanism for driving the staples up through the clamped end of the tissue against the anvil portion, thereby sealing the previously opened end. The scissoring elements may be integrally formed with the shaft or may be detachable such that various scissoring and stapling elements may be interchangeable.

One problem with the foregoing surgical devices, and in particular with the foregoing linear clamping, cutting and stapling devices such as that illustrated in FIG. 1, is that the opposing jaws may be difficult to maneuver within a patient. It may be necessary for a surgeon to move the opposing jaws between various angles in order to position the desired tissue between the opposing jaws. However, it is also generally desirable to make an incision in a patient that is as small as possible, and the small size of an incision limits the degree to which the opposing jaws may be maneuvered.

Another problem with the foregoing surgical devices, and in particular with the foregoing linear clamping, cutting and stapling devices such as that illustrated in FIG. 1, is that the opposing jaws may not be sufficiently hemostatic. Specifically, the opposing jaws of the foregoing surgical devices are not clamped together with sufficient force, thereby reducing the effectiveness of the surgical device.

Thus, there is believed to be a need for an improvement in the maneuverability of clamping, cutting and stapling devices. In addition, there is believed to be a need for a clamping, cutting and stapling device that provides additional clamping force.

SUMMARY

In accordance with an example embodiment of the present invention, a surgical device is provided that includes a jaw portion pivotably connected to a shaft portion about a hinge. The hinge defines an axis of rotation of these components that is perpendicular to one or both of the jaw portion and the shaft portion. The jaw portion, or a part thereof, may also be rotatable relative to the shaft portion about the longitudinal axis of the jaw portion.

The jaw portion includes a first jaw and a second jaw. The second jaw is disposed in opposed correspondence with the first jaw. The first jaw may be pivotably coupled to the second jaw. The device may also include at least one of a cutting element and a stapling element disposed within the second jaw, preferably a blade rotatably mounted on a staple-driving wedge. The cutting element and/or the stapling element may be configured to move between a distal end and a proximal end of the second jaw to at least one of cut and staple a section of tissue disposed between the first and second jaws.

In accordance with an example embodiment of the present invention, a surgical device is provided that includes a jaw portion. The jaw portion includes a first jaw and a second jaw moveable relative to the first jaw. The surgical device also includes a shaft portion coupled to a proximal end of the jaw portion. The surgical device further includes a driver configured to cause relative movement of the jaw portion and the shaft portion. The jaw portion defines a first longitudinal axis and the shaft portion defines a second longitudinal axis. The driver may be configured to cause the jaw portion to pivot relative to the shaft portion about a pivot axis that is perpendicular to the first and second longitudinal axes. The first and second jaws may be moveable relative to each other in a plane, the pivot axis being arranged parallel to the plane. Also, in accordance with an example embodiment of the present invention, the driver is also configured to cause at least a portion of the jaw portion to pivot relative to the shaft portion about the first longitudinal axis.

The driver may be adapted to be driven by a first rotatable drive shaft and a second rotatable drive shaft. For instance, the driver may be configured such that rotation of the first and second rotatable drive shafts in opposite directions relative to each other causes the jaw portion to pivot relative to the shaft portion about the pivot axis. Also, the driver may be configured such that rotation of the first and second rotatable drive shafts in a same direction relative to each other causes the at least a portion of the jaw portion to rotate relative to the shaft portion about the first longitudinal axis. Furthermore, the driver may be configured such that rotation of the first rotatable drive shaft without rotating the second rotatable drive shaft causes relative movement of the first jaw and the second jaw.

The surgical device may include a surgical member disposed within the first jaw. The surgical member may include a cutting element and/or a stapling element. The driver may be configured such that rotation of the second rotatable drive shaft without rotating the first rotatable drive shaft causes relative movement of the surgical member within the first jaw.

In accordance with an example embodiment of the present invention, there is provided a surgical device that includes a jaw portion including a first jaw and a second jaw moveable relative to the first jaw, a shaft portion coupled to a proximal end of the jaw portion, and a driver adapted to be driven by first and second rotatable drive shafts such that selective rotation of the first and second rotatable drive shafts causes the surgical device to perform at least four different functions, e.g., movement of a first one of the jaw portion, the first jaw, the second jaw and the shaft portion relative to at least a second one of the jaw portion, the first jaw, the second jaw and the shaft portion.

The jaw portion may define a first longitudinal axis, the first of the at least four different functions including the rotation of at least a portion of the jaw portion relative to the shaft portion about the first longitudinal axis. The driver is configured to be driven by rotation of the first and second rotatable drive shafts in a same direction relative to each other so as to cause the at least a portion of the jaw portion to rotate relative to the shaft portion about the first longitudinal axis. The shaft portion may define a second longitudinal axis, a second of the at least four different functions including pivoting the jaw portion relative to the shaft portion about a pivot axis that is perpendicular to the second longitudinal axis. The driver is configured to be driven by rotation of the first and second rotatable drive shafts in opposite directions relative to each other so as to cause the jaw portion to pivot relative to the shaft portion about the pivot axis. A third of the at least four different functions may include moving the first jaw relative to the second jaw. The driver is configured to be driven by the first rotatable drive shaft without rotation of the second rotatable drive shaft to cause relative movement of the first jaw and the second jaw. In addition, the surgical device may also include a surgical member, e.g., a cutting and/or stapling element, disposed within the first jaw, a fourth of the at least four different functions including relative movement of the surgical member within the first jaw. The driver is configured to be driven by rotation of the second rotatable drive shaft without rotation of the first rotatable drive shaft so as to cause relative movement of the surgical member within the first jaw.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a conventional linear clamping, cutting and stapling device;

FIG. 2( a) is a perspective view of an example embodiment of an electro-mechanical driver component, according to the present invention;

FIG. 2( b) is a schematic diagram that illustrates some of the components of a surgical device, according to an example embodiment of the present invention;

FIG. 3( a) is a perspective view of a surgical device, according to an example embodiment of the present invention;

FIG. 3( b) is a rear perspective view that illustrates some of the internal components of the surgical device, according to one embodiment of the present invention;

FIG. 3( c) is a side perspective view that illustrates some of the internal components of the surgical device, according to one embodiment of the present invention;

FIG. 3( d) is a perspective view that illustrates a jaw portion being fully pivoted, e.g., articulated, relative to a shaft portion, according to one embodiment of the present invention;

FIG. 3( e) is a bottom perspective view that illustrates the jaw portion being fully pivoted relative to the shaft portion, according to one embodiment of the present invention;

FIG. 3( f) is an exploded view of a replaceable staple cartridge, according to one embodiment of the present invention;

FIG. 3( g) is a cross-sectional view of the surgical device, according to one embodiment of the present invention, in a fully closed position;

FIG. 3( h) is a bottom view of a first jaw, according to another example embodiment of the present invention;

FIG. 3( i) to 3(l) are side cross-sectional views that illustrate the opening and closing of first and second jaws, according to another example embodiment of the present invention;

FIG. 4( a) is a perspective view of an articulating clamping, cutting and stapling attachment, according to another example embodiment of the present invention;

FIG. 4( b) is a perspective view that illustrates additional features of the second jaw of the jaw portion, according to an example embodiment of the present invention;

FIG. 5( a) is a perspective view that illustrates the proximal end of the second jaw, according to an example embodiment of the present invention;

FIG. 5( b) illustrates the surgical device of FIG. 4( a) when moved into a first partially closed position;

FIG. 5( c) illustrates the surgical device of FIG. 4( a) when moved into a second partially closed position;

FIG. 5( d) illustrates the surgical device of FIG. 4( a) when moved into a fully closed position;

FIG. 6( a) illustrates a flexible shaft and a first coupling, according to an example embodiment of the present invention;

FIG. 6( b) illustrates a rear perspective view of the first coupling, according to an example embodiment of the present invention;

FIG. 6( c) illustrates a front perspective view of the first coupling, according to the example embodiment shown in FIG. 6( b);

FIG. 6( d) is a side perspective view of some of the internal components of the first coupling, according to an example embodiment of the present invention;

FIG. 6( e) is a rear perspective view of the second coupling at the distal end of the flexible shaft, according to an example embodiment of the present invention;

FIG. 7 illustrates a side view, partially in section, of the flexible shaft, according to another example embodiment of the present invention;

FIG. 8 is a cross-sectional view of the flexible shaft taken along the line 8-8 illustrated in FIG. 7;

FIG. 9 illustrates a rear end view of first coupling, according to an example embodiment of the present invention;

FIG. 10, there is seen a front end view of the second coupling of the flexible shaft, according to an example embodiment of the present invention;

FIG. 11 illustrates schematically an arrangement of motors, according to an example embodiment of the present invention;

FIG. 12 illustrates a schematic view of the electro-mechanical driver component, according to an example embodiment of the present invention;

FIG. 13 is a schematic view of an encoder, according to an example embodiment of the present invention;

FIG. 14 schematically illustrates the memory module, according to an example embodiment of the present invention;

FIG. 15, there is seen a schematic view of a wireless RCU, according to an example embodiment of the present invention; and

FIG. 16, there is seen a schematic view of a wired RCU, according to an example embodiment of the present invention.

DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS

FIG. 2( b) is a schematic diagram that illustrates some of the components of a surgical device 11, according to an example embodiment of the present invention. The surgical device 11 is configured so as to be particularly well-suited for insertion into the body of a patient, e.g., via a cannula (not shown). In the embodiment shown, the surgical device 11 is a clamping, cutting and stapling device. The surgical device 11 includes a jaw portion 11 a that is pivotably coupled to a shaft portion 11 b by a hinge portion 11 c. The jaw portion 11 a includes a first jaw 50 having a distal end 50 a and a proximal end 50 b, and a second jaw 80 having a distal end 80 a and a proximal end 80 b. The first jaw 50 and the second jaw 80 are pivotably coupled relative to each other at or near their respective proximal ends 50 b, 80 b. In the example embodiment shown, the first jaw 50 and the second jaw 80 pivot relative to each other about pivot axis A, which is oriented perpendicular to the page.

As mentioned above, the jaw portion 11 a is pivotably coupled to the shaft portion 11 b by the hinge portion 11 c. Specifically, the jaw portion 11 a is pivotable relative to the shaft portion 11 b about a pivot axis B, which may be positioned at any location on or between the jaw portion 11 a and the shaft portion 11 b, and at any circumferential location relative to the jaw portion 11 a and the shaft portion 11 b. In the example embodiment shown, the pivot axis B is oriented vertically in the view shown, such that, upon articulation, the jaw portion 11 a pivots within a plane that is perpendicular to the page. It should be recognized that, in other example embodiments, the pivot axis B may have a different orientation, so as to enable the jaw portion 11 a to pivot within a different plane. The jaw portion 11 a may be pivotable to and between any angles relative to the shaft portion 11 b, such that the jaw portion 11 a can be selectively positioned as desired during use. Multiple pivot axes relative to the longitudinal axis of the shaft portion 11 b (the longitudinal axis of the shaft portion 11 b is designated as axis D in FIG. 2( b)) may be provided. For instance, in various embodiments, the jaw portion 11 a may be rotatable relative to the shaft portion 11 b about its longitudinal axis D, or may be rotatable relative to the shaft portion 11 b about multiple pivot axes that are perpendicular to the longitudinal axis D.

The shaft portion 11 b may include a distal portion 1101, to which the jaw portion 11 a is connected, and a proximal portion 1102. The proximal portion 1102 of the shaft portion 11 b may include a handle 1103, with which a user may grasp the surgical device 11. At a proximal-most end of the proximal portion 1102, the shaft portion 11 b may include a connection element 1104, e.g., a quick-connect coupling, for connecting to a flexible shaft (described in further detail below).

The second jaw 80 includes a clamping surface 106. The second jaw 80 also includes a cutting and stapling element 104, which may form at least part of the clamping surface 106 of the second jaw 80. The first jaw 50 includes an anvil member 700 in opposed correspondence with the second jaw 80. The anvil member 700 includes the clamping surface 108, which, along with the clamping surface 106 of the second jaw 80, clamps a section of tissue to, be cut and stapled. As explained in greater detail below, the cutting and stapling element 104 is configured to cut and staple a section of tissue when the first jaw 50 and the second jaw 80 are in a closed, e.g., fully closed, position. Additional features of the cutting and stapling element 104, according to an embodiment, are illustrated and described, for instance, in connection with FIGS. 3( f) and 3(g) below, and further in U.S. patent application Ser. No. 09/999,546, filed Nov. 30, 2001, and 10/460,291, filed Jun. 11, 2003, each of which, as set forth above, are hereby expressly incorporated herein by reference in their entirety.

Various drivers may be employed to drive the movements of the surgical device 11, e.g., pivoting the jaw portion 11 a relative to the shaft portion 11 b, rotating the jaw portion 11 a or some part thereof around its longitudinal axis relative to the shaft portion 11 b, pivoting the first jaw 50 relative to the second jaw 80, firing of a staple cartridge, etc. According to one embodiment of the present invention, these functions are performed by connection of the surgical device 11 to a flexible shaft having two rotatable drive shafts, although is should be recognized that in other embodiments, different types and/or a different number of drive components may be employed.

FIG. 2( b) illustrates schematically an embodiment wherein the surgical device 11 employs first and second drivers 88 and 98, each of which is connected to a respective one of two rotatable drive shafts of a, e.g., flexible, drive shaft. For instance, a first driver 88 may, e.g., operate to move the first jaw 50 and the second jaw 80 relative to each other. The first driver 88 may include any type of drive mechanism capable of moving the first jaw 50 and the second jaw 80 relative to each other. The first driver 88 may be situated at least partially in the proximal end 80 b of the second jaw 80 and may be connected to the proximal end 50 b of the first jaw 50. The first driver 88 may engage the proximal end 50 b of the first jaw 50 so as to open and close the first jaw 50 relative to the second jaw 80. In addition, the first driver 88 may extend through the shaft portion 11 b of the surgical device 11 to a first drive socket 654. The first drive socket 654 of the first driver 88 is coupled to a first motor 96 by a first drive shaft 94. As will be explained in more detail below, the first driver 88, when engaged by the first motor 96 via the first drive shaft 94, may operate to open and close first jaw 50 relative to second jaw 80, in addition to performing other operations of the surgical device 11.

The second jaw 80 also includes a second driver 98. The second driver 98 may also extend through the shaft portion 11 b of the surgical device 11 to a second drive socket 694. The second drive socket 694 is coupled to a second motor 100 by a second drive shaft 102. The second driver 98, when engaged by the second motor 100 via the second drive shaft 102, may operate to drive the cutting and stapling element 104 to cut and staple a section of tissue 52. In addition to performing other operations of the surgical device 11.

While two drive sockets, e.g., the first drive socket 654 and the second drive socket 694, and two corresponding drive shafts, e.g., the first drive shaft 94 and the second drive shaft 102, are illustrated as being part of the surgical device 11 and as being for the purposes of clamping, cutting and stapling a section of tissue, it is possible to provide any suitable number of drive sockets and drive shafts. For example, a single drive shaft may be provided to perform the above-described functions of the surgical device 11.

In one embodiment, the two drive shafts, e.g., the first drive shaft 94 and the second drive shaft 102, are also configured to be employed to move the jaw portion 11 a relative to the shaft portion 11 b. An example of this type of embodiment is illustrated in, e.g., FIGS. 3( a) through 3(e), and is described further below. Alternatively, and as shown in FIG. 2( b), the surgical device 11 may also include a third driver 201 and a fourth driver 202 that are employed to move the jaw portion 11 a relative to the shaft portion 11 b. For instance, the third driver 201 may be configured to pivot the jaw portion 11 a about axis B relative to the shaft portion 11 b, while the fourth driver 202 may be configured to rotate the jaw portion 11 a about its longitudinal axis D relative to the shaft portion 11 b. In one embodiment, the third and fourth drivers 201, 202 are rotatable drive shafts that extend through the shaft portion 11 b of the surgical device 11 to third and fourth drive sockets 2011, 2021, respectively. The third drive socket 2011 is coupled to a third motor 2013 by a third drive shaft 2012. The third driver 201, when engaged by the third motor 2013 via the third drive shaft 2012, operates to pivot the jaw portion 11 a about axis B relative to the shaft portion 11 b. The fourth drive socket 2021 is coupled to a fourth motor 2023 by a fourth drive shaft 2022. The fourth driver 202, when engaged by the fourth motor 2023 via the fourth drive shaft 2022, operates to rotate the jaw portion 11 a about its longitudinal axis D relative to the shaft portion 11 b.

The drive shafts, e.g., first and second rotatable drive shafts 94 and 102 and any other drive shafts, may be housed within a flexible drive shaft, such as the flexible drive shaft 1620 illustrated in FIG. 2( a). Other types of flexible drive shafts may also be employed. For instance, the drive shafts may be housed within a flexible drive shaft of the type described and illustrated in Applicant's co-pending Provisional Patent App. Designated as Attorney Docket No. 11443/210, which is expressly incorporated by reference herein in its entirety.

Referring to FIG. 2( b), the surgical device 11 may also include a memory module 6041. In one embodiment, the memory module 6041 is connected to or integral with the cutting and stapling element 104. The memory module 6041 is connected to a data connector 1272 by a data transfer cable 1278. Additional features of these components are set forth in connection with FIGS. 3( f) and 7.

Furthermore, FIG. 2( b) also illustrates a connection element 1104. The connection element 1104 may include a quick connect sleeve 713 that has quick connect slots 713 a that engage complementary quick connect elements 1664 of a flexible drive shaft 1620, which is described in further detail below. In order to retain the quick connect elements 1664 of the flexible drive shaft 1620 in the quick connect slots 713 a of the quick connect sleeve 713, the connection element 1104 may also include a spring.

According to an example embodiment of the present invention, the surgical device 11 may be configured as an attachment to, or may be integral with, an electro-mechanical surgical system, such as the electro-mechanical driver component 1610 having a motor system illustrated in FIG. 2( a). It should be appreciated that, in this example embodiment, any appropriate number of motors may be provided, and the motors may operate via battery power, line current, a DC power supply, an electronically controlled DC power supply, etc. It should also be appreciated that the motors may be connected to a DC power supply, which is in turn connected to line current and which supplies the operating current to the motors. In another example embodiment, the surgical device may be an attachment to, or may integral with, a mechanical driver system.

FIG. 3( a) is a perspective view of a surgical device 11, according to one embodiment of the present invention. As set forth above, FIGS. 3( a) to 3(e) illustrate one embodiment of the present invention in which two drive shafts are configured to be employed to move the jaw portion 11 a relative to the shaft portion 11 b, to rotate the jaw portion 11 a about its longitudinal axis, to move the first jaw 50 relative to the second jaw 80, and to fire a stapling and cutting cartridge. In the position shown in FIG. 3( a), the jaw portion 11 a is positioned at an angle of approximately 60 degrees relative to the shaft portion 11 b. The jaw portion 11 a may be appropriately positioned according to the incision made in the patient and to the position of the tissue desired to be clamped, cut and stapled.

FIG. 3( b) is a rear perspective view that illustrates some of the internal components of the surgical device 11, according to an example embodiment of the present invention. The outer body of the surgical device 11 is shown in ghost lines. As shown, the jaw portion 11 a is in an initial position in which it is axially aligned with the shaft portion 11 b.

FIG. 3( b) shows a first rotatable drive shaft 500, which may be axially rotatable within the shaft portion 11 b. Coupled to the first rotatable drive shaft 500 is a gear element 502. The gear element 502 rotates about a longitudinal axis and is meshingly engaged with a gear element 504. The gear element 504 is held in position by pin 505, the central axis of which is coaxial with the pivot axis B around which the jaw portion 11 a pivots relative to the shaft portion 11 b.

The gear element 504 is also meshingly engaged with a gear element 506 within the jaw portion 11 a. The gear element 506 is connected to a gear element 510 by a shaft 508. The gear element 506, the gear element 510, and the shaft 508 rotate within the jaw portion 11 a about a longitudinal axis defined by the central axis of the shaft 508. The gear element 510 is meshingly engaged with a gear element 512 that rotates about a pin 513 that is longitudinally arranged within the jaw portion 11 a. The gear element 512 is meshingly engaged with a gear element 514. The gear element 514 has a shaft portion that extends distally to a set of teeth 516. The teeth 516 are selectively engageable with a correspondingly-shaped opening in a plate 518, the plate 518 being keyed to an internal surface of the surgical device 11 so as to prevent relative rotation of the plate 518. The plate 518 is moveable in an axial direction between a first position, in which the correspondingly-shaped opening in the plate 518 is locked in engagement with the teeth 516, and a second position, in which the plate 518 is moved distally relative to the first position and the correspondingly-shaped opening in the plate 518 is not in engagement with the teeth 516.

Extending distally from the gear 514 and the shaft portion carrying the teeth 516 is a threaded screw 520. The threaded screw 520 is arranged longitudinally and is configured to rotate about a longitudinal axis when the gear 514 is rotated. Mounted on the threaded screw 520 is a push block 522. The push block 522 is keyed to an internal surface of the surgical device 11, so as to prevent relative rotation of the push block 520. Rotatably coupled to the lower distal end of the push block 520 is a pair of rollers 524. The pair of rollers 524 are seated within respective slots 5011 on each side of the upper jaw 50. The upper jaw 50 and the slots 5011 are shown in dotted line in FIG. 3( b).

FIG. 3( b) also shows a second rotatable drive shaft 550, which may be axially rotatable within the shaft portion 11 b. Coupled to the second rotatable drive shaft 550 is a gear element 552. The gear element 552 rotates about a longitudinal axis and is meshingly engaged with a gear element 554. The gear element 554 is held in position by pin 505, the central axis of which is coaxial with the pivot axis B around which the jaw portion 11 a pivots relative to the shaft portion 11 b.

The gear element 554 is also meshingly engaged with a gear element 556 within the jaw portion 11 a. The gear element 556 is connected to a gear element 560 by a shaft 558. The gear element 556, the gear element 560, and the shaft 558 rotate within the jaw portion 11 a about a longitudinal axis defined by the central axis of the shaft 558. The gear element 560 is meshingly engaged with a gear element 562 a that is mounted on a proximal end of the pin 513. The gear element 562 a is configured to adapted to be non-rotatably mounted on, and thus to rotate with, the pin 513, the pin 513 extending longitudinally within the jaw portion 11 a. In addition, a gear element 562 b is adapted to be non-rotatably mounted on a distal end of the pin 513. Thus, the gear element 562 b is also configured to rotate with the pin 513.

The gear element 562 b has a shaft portion that extends distally and includes a set of teeth 5661 (hidden from view in FIG. 3( b) but shown in FIG. 3( d)). The teeth 5661 are selectively engageable with a correspondingly-shaped opening in the plate 518. As set forth above, the plate 518 is keyed to an internal surface of the surgical device 11 so as to prevent relative rotation of the plate 518, and is moveable in an axial direction between the first position, in which the correspondingly-shaped opening in the plate 518 is locked in engagement with the teeth 5661, and the second position, in which the plate 518 is moved distally relative to the first position and the correspondingly-shaped opening in the plate 518 is not in engagement with the teeth 5661.

The gear element 562 b is meshingly engaged with a gear element 564. Extending distally from the gear 564 is a first longitudinal rod 566. The first longitudinal rod 566 is attached to a second longitudinal rod 568. The second longitudinal rod 568 has a shoulder 572. Between the first longitudinal rod 566 and the shoulder 572 of the second longitudinal rod 568 is a spring. The distal end 574 of the second longitudinal rod 568 is configured to engage a respective opening in a wedge driver 605. The wedge driver 605 rotates so as to drive a stapling/cutting wedge (described in further detail below) along a staple cartridge.

These components are also shown in various other views. For instance, FIG. 3( c) is a side perspective view that illustrates some of the internal components of the surgical device 11. As shown, the jaw portion 11 a is pivoted, e.g., articulated, relative to the shaft portion 11 b. In addition, FIG. 3( d) is a perspective view that illustrates the jaw portion 11 a being further pivoted, e.g., articulated, relative to the shaft portion 11 b. Also, FIG. 3( e) is a bottom perspective view that illustrates the jaw portion 11 a being pivoted, e.g., articulated, relative to the shaft portion 11 b.

As set forth above, the surgical device 11 may also include a cutting and stapling element 104. In one embodiment, the staple and cutting element 104 is a staple cartridge. FIG. 3( f) is an exploded view of a replaceable staple cartridge 600. The replaceable staple cartridge 600 is one type of stapling/cutting arrangement that may be employed as the cutting and stapling element 104 in the example embodiment of the present invention illustrated in FIGS. 3( a) to 3(e). The replaceable staple cartridge 600 includes a staple tray 604. The staple tray 604 has a slot 604 i at its proximal end 604 d in which the memory module 6041 is retained by a memory module retainer 6042. The memory module 6041 may store information as described, for example, in U.S. patent application Ser. No. 09/723,715, filed on Nov. 28, 2000, now issued as U.S. Pat. No. 6,793,652 on Sep. 21, 2004, U.S. patent application Ser. No. 09/836,781, filed on Apr. 17, 2001, U.S. patent application Ser. No. 09/887,789, filed on Jun. 22, 2001 and U.S. patent application Ser. No. 10/099,634, filed on Mar. 15, 2002, each of which is expressly incorporated herein by reference in its entirety. A wedge driver 605 is configured to be rotatably disposed through a central channel 604 e of the staple tray 604. Specifically, the wedge driver 605 has a distal end 605 a that is configured to be rotatably mounted within a distal orifice 604 a of the staple tray 604. The wedge driver 605 also includes an externally threaded region 605 b, a non-threaded portion 605 c that rotatably extends through a proximal orifice 604 b in the proximal end 604 b of the staple tray 604, and a proximally-facing opening 605 d at its proximal-most end for receiving the distal end 574 of the second longitudinal rod 568. The proximally-facing opening 605 d and the distal end 574 of the second longitudinal rod 568 are adapted for non-rotatable coupling relative to each other when the distal end 574 of the second longitudinal rod 568 is received, e.g., inserted, within the proximally-facing opening 605 d.

The replaceable staple cartridge 600 also includes a wedge 603 having an internally threaded bore 603 a. The externally threaded region 605 b of the wedge driver 605 is configured to extend through the internally threaded bore 603 a of the wedge 603. The threads of the internally threaded bore 603 a of the wedge 603 match the threads of the externally threaded region 605 b of the wedge driver 605. As is discussed further below, upon rotation of the wedge driver 605, the wedge 603 is moved between the distal end 604 c of the staple tray 604 and the proximal end 604 d of the staple tray 604 through a central channel 604 e.

The staple tray 604 also includes a plurality of vertically-disposed slots 604 f in opposing walls 604 g of the central channel 604 e. On each side of the central channel 604 e, a staple pusher 607 is configured to be slideably disposed within the slots 604 f. More specifically, each of the staple pushers 607 has a top surface 607 a running longitudinally between two rows 607 b of staple pushing fingers 607 c. The staple pushing fingers 607 c are configured such that each staple pushing finger 607 c in the row 607 b that abuts the wall 604 g of the staple tray 604 is retained within a corresponding slot 604 f of the wall 604 g so as to be vertically slideable therein. The staple pushing fingers 607 c are positioned over slots 604 h in the staple tray 604. The slots 604 h in the staple tray 604 house a plurality of fasteners, e.g., staples 606. Each of the staples 606 includes a butt 606 a and a pair of prongs 606 b.

The wedge 603 also includes a pair of sloped edges 603 b that slideably engage respective top surfaces 607 a of the staple pushers 607. When the wedge 603 is moved from the distal end 604 c to the proximal end 604 d of the staple tray 604 through the central channel 604 e, the pair of sloped edges 603 b of the wedge 603 is configured to slideably engage the respective top surfaces 607 a of the staple pushers 607 in order to successively push the staple pushing fingers 607 c of the staple pushers 607 into, and thus the staples 606 out of, the slots 604 h in the staple tray 604. A cartridge top 611 is configured to fit over the central channel 604 a of the staple tray 604, while a staple retainer 610 is configured to cover the clamping surface 106 of the staple tray 604. Additional features, e.g., a blade 51, of the staple cartridge 600 are described below in connection with FIG. 3( g), these features being described during operation of the surgical device 11.

FIG. 3( h) is a bottom view of the first jaw 50. The first jaw 50 includes an anvil member 700 having a longitudinally-disposed slot 701 that extends from a distal end to a proximal end of the anvil member 700. The slot 701 is aligned with the blade 51 of the second jaw 80 so that the blade 51 extends into and travels along the slot 701 when the blade is moved from the distal end 80 a to the proximal end 80 b of the second jaw 80. The anvil member 700 also includes a plurality of rows 702 of staple guides 703. The staple guides 703 are configured to receive the prongs 606 b of the staples 606 and to bend the prongs 606 b so as to close the staples 606. When the surgical device 11 is in the closed position, the rows 702 of the staple guides 703 align with the slots 604 h of the staple tray 604 in the second jaw 80.

In operation, the jaw portion 11 a is maintained in an initial position in which it is axially aligned with the shaft portion 11 b, such as the position shown in FIG. 3( b). In this position, the surgical device 11 may be inserted, e.g., through a trocar, into a surgical site. Depending on the position of the incision and the tissue to be clamped, stapled and cut, the user may then articulate the jaw portion 11 a relative to the shaft portion 11 b.

In a first articulation process, the jaw portion 11 a is pivoted relative to the shaft portion 11 b. The plate 518 is arranged in its first position, e.g., such that the two openings in the plate 518 are locked in respective engagement with the teeth 516 of gear element 514 and with the teeth 5661 of the gear element 562 b. The first rotatable drive shaft 500 and the second rotatable drive shaft 550 are then rotated in opposite directions. For instance, referring to FIG. 3( b), in order to articulate the jaw portion 11 a in a clockwise direction relative to the shaft portion 11 b (when viewed from above), the first rotatable drive shaft 500 may be rotated in a counter-clockwise direction (for the sake of simplicity, all references herein to a rotational direction, e.g., clockwise or counterclockwise, refer to a view from the proximal end of the surgical device towards the distal end of the surgical device 11, unless otherwise noted). The gear element 502 attached to the first rotatable drive shaft 500 is thus also caused to rotate in a counter-clockwise direction. By virtue of its engagement with the gear element 504, the counter-clockwise rotation of the gear element 502 causes the gear element 504 to rotate in a counter-clockwise direction (when viewed from above) about the pin 505. By virtue of its engagement with the gear element 506, the counter-clockwise rotation of the gear element 504 causes the gear element 506 to rotate in a clockwise direction.

Simultaneously, the second rotatable drive shaft 550 may be rotated in a clockwise direction. The gear element 552 attached to the second rotatable drive shaft 550 is thus also caused to rotate in a clockwise direction. By virtue of its engagement with the gear element 554, the clockwise rotation of the gear element 552 causes the gear element 554 to rotate in a counter-clockwise direction (when viewed from above) about the pin 505. By virtue of its engagement with the gear element 556, the clockwise rotation of the gear element 554 causes the gear element 556 to rotate in a counter-clockwise direction. The engagement of the plate 518 with the teeth 516 and 5661 prevents the rotation of the gear elements 506 and 566 relative to the surgical device 11. Thus, the jaw portion 11 a is caused to rotate in a clockwise direction relative to the shaft portion 11 b (when viewed from above). To rotate the jaw portion 11 a in the opposite direction, e.g., counter-clockwise relative to the shaft portion 11 b when viewed from above, the direction of rotation of the first and second rotatable drive shafts 500, 550 are reversed.

Once the jaw portion 11 a is rotated about the pin 505 to a desired position, the jaw portion 11 a may also be rotated, in a second articulation process, relative to the shaft portion 11 b about the longitudinal axis of the jaw portion 11 a, e.g., illustrated as axis D. The plate 518 is maintained in its first position, such that the two openings in the plate 518 are locked in respective engagement with the teeth 516 of gear element 514 and with the teeth 5661 of the gear element 562 b. The first rotatable drive shaft 500 and the second rotatable drive shaft 550 are then rotated in the same direction. For instance, referring to FIG. 3( b), in order to rotate the jaw portion 11 a about its longitudinal axis in a counter-clockwise direction relative to the shaft portion 11 b, the first rotatable drive shaft 500 may be rotated in a counter-clockwise direction. The gear element 502 attached to the first rotatable drive shaft 500 is thus also caused to rotate in a counter-clockwise direction. By virtue of its engagement with the gear element 504, the counter-clockwise rotation of the gear element 502 causes the gear element 504 to rotate in a counter-clockwise direction (when viewed from above) about the pin 505. By virtue of its engagement with the gear element 506, the counter-clockwise rotation of the gear element 504 causes the gear element 506 to rotate in a clockwise direction. Since the gear element 506 is attached to the gear element 510 by the shaft 508, rotation of the gear element 506 in the clockwise direction causes the gear element 510 to also rotate in a clockwise direction. By virtue of its engagement with the gear element 512, the clockwise rotation of the gear element 510 causes the gear element 512 to rotate in a counter-clockwise direction.

The second rotatable drive shaft 550 may also be rotated in a counter-clockwise direction. The gear element 552 attached to the second rotatable drive shaft 550 is thus also caused to rotate in a counter-clockwise direction. By virtue of its engagement with the gear element 554, the counter-clockwise rotation of the gear element 552 causes the gear element 554 to rotate in a clockwise direction (when viewed from above) about the pin 505. By virtue of its engagement with the gear element 556, the clockwise rotation of the gear element 554 causes the gear element 556 to rotate in a clockwise direction. Since the gear element 556 is attached to the gear element 560 by the shaft 558, rotation of the gear element 556 in the clockwise direction causes the gear element 560 to also rotate in a clockwise direction. By virtue of its engagement with the gear element 562 a, the clockwise rotation of the gear element 560 causes the gear element 562 a to rotate in a counter-clockwise direction. Also, since both the gear element 562 a and the gear element 562 b are adapted to be non-rotatably mounted to, e.g., keyed to, the pin 513, the rotation of the gear element 562 a in a counter-clockwise direction also causes the gear element 562 b to rotate in a counter-clockwise direction.

Thus, the gear element 562 b and the gear element 512 rotate together in a counter-clockwise direction about their shared longitudinal axes, e.g., the central axis of the pin 513. Since the plate 518 is maintained in its first position, the two openings in the plate 518 are locked in respective engagement with the teeth 516 of gear element 514 and with the teeth 5661 of the gear element 562 b. Thus, the rotation of the gear element 562 b, and of the gear element 512 in the counter-clockwise direction about the pin 513, causes the gear element 514 and the gear element 564 to also rotate in a counter-clockwise direction about the pin 513, the central axis of which is coaxial with the longitudinal axis D of the jaw portion 11 a. The gear element is connected to the screw 520, on which is mounted the push block 522. Since the push block 522 is keyed to the internal surface of the jaw portion 11 a, the rotation of the gear element 514 about the longitudinal axis D causes the jaw portion 11 a to rotate relative to the shaft portion 11 b about its longitudinal axis D.

Once the jaw portion 11 a is rotated relative to the shaft portion 11 b about its longitudinal axis D to a desired position, the jaws 50, 80 may be opened so as to enable a section of tissue to be disposed therebetween. To perform this operation, the plate 518 is moved distally to its second position, such that the two openings in the plate 518 are not locked in respective engagement with either the teeth 516 of gear element 514 nor with the teeth 5661 of the gear element 562 b. The first rotatable drive shaft 500 is then rotated in a first direction while the second rotatable drive shaft 550 is not rotated. For instance, referring to FIG. 3( b), in order to open the first jaw 50 relative to the second jaw 80, the first rotatable drive shaft 500 may be rotated in a counter-clockwise direction. The gear element 502 attached to the first rotatable drive shaft 500 is thus also caused to rotate in a counter-clockwise direction. By virtue of its engagement with the gear element 504, the counter-clockwise rotation of the gear element 502 causes the gear element 504 to rotate in a counter-clockwise direction (when viewed from above) about the pin 505. By virtue of its engagement with the gear element 506, the counter-clockwise rotation of the gear element 504 causes the gear element 506 to rotate in a clockwise direction. Since the gear element 506 is attached to the gear element 510 by the shaft 508, rotation of the gear element 506 in the clockwise direction causes the gear element 510 to also rotate in a clockwise direction. By virtue of its engagement with the gear element 512, the clockwise rotation of the gear element 510 causes the gear element 512 to rotate in a counter-clockwise direction. By virtue of its engagement with the gear element 514, the counter-clockwise rotation of the gear element 512 causes the gear element 514 to rotate in a clockwise direction. Since the plate 518 is moved to its second position, the gear element 512 rotates about the pin 513 without the pin 513 rotating.

The clockwise rotation of the gear element 514 causes rotation of the threaded screw 520 in a clockwise direction. In an initial stage of operation, e.g., when the surgical device 11 has first been inserted into a patient's body, the push block 522 is located in a distal-most position along the threaded screw 520. Rotation of the threaded screw 520 causes the push block 522, which is adapted to be non-rotatably mounted within, e.g., keyed to, an internal surface of the surgical device 11, to travel in a proximal direction. The proximal movement of the push block 522 causes the pair of rollers 524 to move proximally within their respective slots 5011 on each side of the upper jaw 50. When the push block 522 has moved to the proximal end of the threaded screw 520, the rollers 524 are positioned at a proximal end of the slots 5011, at which position the first jaw 50 is maximally opened relative to the second jaw 80.

Once the first and second jaws 50, 80 have been opened to a desired position relative to each other, the jaws 50, 80 are closed so as to clamp a section of tissue therebetween. Again, with the plate 518 in its second position, e.g., such that the two openings in the plate 518 are not locked in respective engagement with either the teeth 516 of gear element 514 nor with the teeth 5661 of the gear element 562 b, the first rotatable drive shaft 500 is rotated in a second direction while the second rotatable drive shaft 550 is not rotated. For instance, referring to FIG. 3( b), in order to close the first jaw 50 relative to the second jaw 80, the first rotatable drive shaft 500 may be rotated in a clockwise direction. The gear element 502 attached to the first rotatable drive shaft 500 is thus also caused to rotate in a clockwise direction. By virtue of its engagement with the gear element 504, the clockwise rotation of the gear element 502 causes the gear element 504 to rotate in a clockwise direction (when viewed from above) about the pin 505. By virtue of its engagement with the gear element 506, the clockwise rotation of the gear element 504 causes the gear element 506 to rotate in a counter-clockwise direction. Since the gear element 506 is attached to the gear element 510 by the shaft 508, rotation of the gear element 506 in the counter-clockwise direction causes the gear element 510 to also rotate in a counter-clockwise direction. By virtue of its engagement with the gear element 512, the counter-clockwise rotation of the gear element 510 causes the gear element 512 to rotate in a clockwise direction. By virtue of its engagement with the gear element 514, the clockwise rotation of the gear element 512 causes the gear element 514 to rotate in a counter-clockwise direction. Since the plate 518 is moved to its second position, the gear element 512 rotates about the pin 513 without the pin 513 rotating.

The counter-clockwise rotation of the gear element 514 causes rotation of the threaded screw 520 in a counter-clockwise direction. As set forth above, the push block 522 may be located in a proximal-most position along the threaded screw 520. Rotation of the threaded screw 520 causes the push block 522, which is keyed to an internal surface of the surgical device 11, to travel in a distal direction. The distal movement of the push block 522 causes the pair of rollers 524 to move distally within their respective slots 5011 on each side of the upper jaw 50. When the push block 522 has moved to the distal end of the threaded screw 520, the rollers 524 are positioned at a distal end of the slots 5011, at which position the first jaw 50 is maximally clamped against the second jaw 80. It should be noted that, while the opening and closing of the first and second jaws 50, 80 may occur in a simple scissor type fashion, in other embodiments, the first and second jaws 50, 80 may open and close in a different manner. An example of one such type of movement is described in additional detail below in connection with FIGS. 3( f) through 3(i).

Once a section of tissue has been clamped between the first and second jaws 50, 80, the section of tissue may be cut and stapled. It should be recognized that, while the present invention is illustrated as using both cutting and stapling elements, the surgical device 11 may employ only one such element, or else may employ a different type of surgical instrument. Before the surgical device 11 is inserted into a patient's body, a staple cartridge 578 is provided within the second jaw 80. In one embodiment, the surgical device 11 is a single use device, in which the staple cartridge is integral to the second jaw 80. Alternatively, the surgical device 11 may have a replaceable staple cartridge, e.g., replaceable staple cartridge 600 as illustrated in FIG. 3( f), thereby permitting the surgical device 11 to be used numerous times with different staple cartridges. In this embodiment, if the surgical device 11 is being used for the first time, the staple cartridge 600 may be pre-installed during manufacture and assembly of the surgical device 11, or else may be installed by the user just prior to using the surgical device 11. If the surgical device 11 is being used for the second or more time, the staple cartridge 600 may be installed by the user just prior to using the surgical device 11. When the staple cartridge 600 is inserted into the second jaw 80, the distal end 574 of the longitudinal rod 568 is received within the proximally facing opening 605 d of the wedge driver 605.

To Illustrate the cutting/stapling operation of the surgical device 11, reference is first made to FIG. 3( b). With the staple cartridge 600 installed within the second jaw 80 of the surgical device 11, the plate 518 is maintained in its second position, such that the two openings in the plate 518 are not locked in respective engagement with either the teeth 516 of gear element 514 nor with the teeth 5661 of the gear element 562 b. The second rotatable drive shaft 550 is then rotated in a first direction while the first rotatable drive shaft 500 is not rotated. For instance, in order to out and staple a section of tissue disposed between the first and second jaw 50, 80, the second rotatable drive shaft 550 may be rotated in a counter-clockwise direction. The gear element 552 attached to the second rotatable drive shaft 550 is thus also caused to rotate in a counter-clockwise direction. By virtue of its engagement with the gear element 554, the counter-clockwise rotation of the gear element 552 causes the gear element 554 to rotate in a clockwise direction (when viewed from above) about the pin 505. By virtue of its engagement with the gear element 556, the clockwise rotation of the gear element 554 causes the gear element 556 to rotate in a clockwise direction. Since the gear element 556 is attached to the gear element 560 by the shaft 558, rotation of the gear element 556 in the clockwise direction causes the gear element 560 to also rotate in a clockwise direction. By virtue of its engagement with the gear element 562 a, the clockwise rotation of the gear element 560 causes the gear elements 562 a and 562 b to rotate in a counter-clockwise direction. By virtue of its engagement with the gear element 564, the counter-clockwise rotation of the gear element 562 b causes the gear element 564 to rotate in a clockwise direction. Since the plate 518 is moved to its second position, the gear element 562 b rotates with the pin 513 without the gear element 514 rotating.

The clockwise rotation of the gear element 564 causes rotation of the first longitudinal rod 566 along with the second longitudinal rod 568 in the clockwise direction. The spring 570 that resides between a distal end of the first longitudinal rod 566 and a shoulder 572 of the second longitudinal rod 568 functions to bias the second longitudinal rod 568 in a distal direction, thereby insuring that the distal end 574 of the second longitudinal rod 568 seats within its respective opening 605 d of the wedge driver 605.

To further illustrate the cutting/stapling operation of the surgical device 11, reference is next made to FIG. 3( g). FIG. 3( g) is a cross-sectional view of the surgical device 11, according to one embodiment of the present invention, in a fully closed position. In FIG. 3( g), the surgical device 11 is illustrated absent a section of tissue between the clamping surfaces 106, 108 of the first and the second jaws 50, 80.

As illustrated in FIG. 3( g), the surgical device 11 is disposed within the second jaw 80, and the cutting and stapling element 104 includes the replaceable staple cartridge 600 of FIG. 3( g) that is replaceably mountable within the second jaw 80. The replaceable staple cartridge 600, which was shown in an exploded view in FIG. 3( f), is shown assembled and mounted within the second jaw 80 in FIG. 3( g).

As illustrated in FIG. 3( g), the wedge 603 has disposed thereon a blade 51 having a cutting edge 51 a. Alternatively, the cutting and stapling elements may be separately disposed. In the example embodiment illustrated in FIG. 3( g), the blade 51 has a tail region 654 with a contact face 653. The blade 51 is rotatably coupled to the wedge 603 around pivot 51 b to allow the blade 51 to rotate between a first and a second position. FIG. 3( g) illustrates the wedge 603 and the blade 51 in several positions, labeled as positions A to E, as the wedge 603 and the blade 51 travel from the distal end 604 c to the proximal end 604 d of the staple tray 604.

In the position labeled A, the wedge 603 and the blade 51 are positioned at the distal end 604 c of the staple tray 604. In the position labeled A, the wedge 603 and the blade 51 are housed within a housing 615 and the blade 51 is rotated relative to the wedge 603 so as to be in a retracted position, e.g., the cutting edge 51 a facing upwards and is not exposed. The contact face 653 initially faces the proximal end 604 d of the staple tray 604.

In operation, rotation of the wedge driver 605 via the distal end 574 of the second longitudinal rod 568 causes the wedge 603 and the blade 51 to advance to the position labeled B, via. In the position labeled B, the wedge 603 and the blade 51 are positioned proximally relative to the distal end 604 c of the staple tray 604. Specifically, in the position labeled B, the wedge 603 and the blade 51 are positioned such that the contact face 653 of the blade 51 begins to contact an actuating lip 615 a of the housing 615. As the contact face 653 of the blade 51 begins to contact the actuating lip 615 a of the housing 615, the blade 51 begins to rotate relative to the wedge 603.

Further rotation of the wedge driver 605 via the distal end 574 of the second longitudinal rod 568 causes the wedge 603 and the blade 51 to advance to the position labeled C. In the position labeled C, the wedge 603 and the blade 51 are positioned still further proximally relative to the distal end 604 c of the staple tray 604. Specifically, in the position labeled C, the wedge 603 and the blade 51 are positioned such that the contact face 653 of the blade 51 has fully contacted the actuating lip 615 a of the housing 615. When the contact face 653 of the blade 51 has fully contacted the actuating lip 615 a of the housing 615, the blade 51 is fully rotated relative to the wedge 603 such that the cutting edge 51 a of the blade 51 is in an extended position, e.g., the cutting edge 51 a faces the proximal end 604 d of the staple tray 604.

Further rotation of the wedge driver 605 via the distal end 574 of the second longitudinal rod 568 causes the wedge 603 and the blade 51 to advance to the position labeled D. In the position labeled D, the wedge 603 and the blade 51 are positioned approximately at the midpoint between the distal end 604 c and the proximal end 604 d of the staple tray 604. In the position labeled D, the blade 51 is maintained in the extended position having the cutting edge 51 a facing the proximal end 604 d of the staple tray 604 so as to cut a section of tissue (not shown) that is clamped between the first jaw 50 and the second jaw 80.

Further rotation of the wedge driver 605 via the distal end 574 of the second longitudinal rod 568 causes the wedge 603 and the blade 51 to advance to the position labeled E. In the position labeled E, the wedge 603 and the blade 51 are positioned at the proximal end 604 d of the staple tray 604. In the position labeled E, the blade 51 is still maintained in the extended position with the cutting edge 51 a facing the proximal end 604 d of the staple tray 604. Here, however, the blade 51 is enclosed within a housing 616 so that the cutting edge 51 a is not exposed.

The staples 606 housed within the staple tray 604 may simultaneously be fired with the movement of the blade 51 from the proximal end 80 b to the distal end 80 a of the second jaw 80. For instance, rotation of the wedge driver 605 via the distal end 574 of the second longitudinal rod 568 causes the wedge 603 to be moved through the central channel 604 e of the staple tray 604. As the wedge 603 is moved from the distal end 604 c to the proximal end 604 d of the staple tray 604 through the central channel 604 e, the pair of sloped edges 603 b of the wedge 603 slideably engage the respective top surfaces 607 a of the staple pushers 607 and successively push the staple pushing fingers 6070 of the staple pushers 607 into, and thus the staples 606 out of, the slots 604 h in the staple tray 604. When the surgical device 11 is in the closed position, the rows 702 of the staple guides 703 align with the slots 604 h of the staple tray 604 in the second jaw 80 so that the staples 606 maintained in the slots 604 h of the staple tray 604 are pushed by the staple pushing fingers 607 c of the staple pushers 607 into, and closed by, corresponding staple guides 703 of the anvil member 700. The staple guides 703 receive the prongs 606 b of the staples 606 when the surgical device ills fired and bend the prongs 606 b so as to close the staples 606, thereby stapling the section of tissue.

It should be recognized that, according to various embodiments of the present invention, the blade 51 and the wedge 603 may be moved in either a proximal or a distal direction in order to cut a section of tissue disposed between the first jaw 50 and the second jaw 80. Furthermore, it should be recognized that, according to various embodiments of the present invention, any mechanical arrangement that is configured to move the blade 51 and the wedge 603 in order to cut and/or staple a section of tissue disposed between the first jaw 50 and the second jaw 80 may be employed.

As set forth above, while the opening and closing of the first and second jaws 50, 80 may occur in a simple scissor type fashion, in other embodiments, the first and second jaws 50, 80 may open and close in a different manner. An example of one such type of movement is described generally below in connection with FIGS. 3( i) through 3(l). Further details and benefits of this type of movement are described in patent application Ser. No. 10/460,291, filed Jun. 11, 2003, which is expressly incorporated herein in its entirety by reference thereto. For the purposes of clarity, those components of the surgical device 11 that are located proximal to the gear element 514 and the gear element 564 are not shown. It should be understood that these gear elements 514, 564 may be driven by the combination of drive components illustrated in FIGS. 3( a) through 3(e), or by any other combination of driving components.

FIG. 3( i) illustrates the first jaw 50 in an open position relative to the second jaw 80. In this position, the push block 522 is at or near a proximal end of the threaded screw 520, and the rollers 524 attached to the push block 522 are positioned at or near the proximal end of slots 5011 of the first jaw 50. The first jaw 50 includes a pivot pin 5012, which is engaged within a vertical slot 5013 of the second jaw 80. The proximal ends 50 b, 80 b of the first and second jaws 50, 80, respectively, are biased apart from each other, such that, in the initial position shown in FIG. 3( i), the pin 5012 is positioned at the lower end of the slot 5013.

Referring to FIG. 3( j), as the gear element 514 is rotated, the push block 522 moves distally to a first intermediate position of the threaded screw 520, and the rollers 524 attached to the push block 522 are likewise moved distally to a first intermediate position within the slots 5011 of the first jaw 50. In the position shown in FIG. 3( j), the pin 5012 has moved within the slot 5013 until it eventually is positioned at the upper end of the slot 5013. In this manner, the distal ends 50 a, 80 a of the first and second jaws 50, 80 are brought together prior to the first and second jaws 50, 80 being fully clamped together.

Referring to FIG. 3( k), as the gear element 514 is further rotated, the push block 522 continues to move distally to a second intermediate position of the threaded screw 520, and the rollers 524 attached to the push block 522 are likewise continued to move distally to a second intermediate position within the slots 5011 of the first jaw 50. In the position shown in FIG. 3( k), the further clamping of the first and second jaws 50, 80 cause the pin 5012 to again move within the slot 5013 until it is eventually positioned at the lower end of the slot 5013. In this manner, the distal ends 50 a, 80 a of the first and second jaws 50, 80 remain together while the proximal portions of the first and second jaws 50, 80 are gradually clamped together. Continued distal movement of the push block 522 along the threaded screw 520 eventually places the surgical device 11 in the position illustrated in FIG. 3( l), in which the first and second jaws 50, 80 are clamped together at both their distal ends 50 a, 80 a and their proximal ends 50 b, 80 b.

As set forth above, there are various different mechanisms that may be employed to move the first jaw 50 relative to the second jaw 80. Irrespective of the mechanism employed for this purpose, it is generally desirable to use a mechanism that exerts a strong clamping force on a section of tissue that is disposed between the first jaw 50 and the second jaw 80. FIG. 4( a) is a perspective view of the surgical device 11, according to another embodiment of the present invention, which employs a different mechanism for moving the first jaw 50 relative to the second jaw 80.

FIG. 4( b) is a perspective view that illustrates additional features of the second jaw 80 of the jaw portion 11 a. For the purpose of clarity, the first jaw 50 is shown in ghost lines. Specifically, FIG. 4( b) illustrates portions of the first driver 88, e.g., a horizontal driver element 301 that is connected to a first rotatable clamping element 302. These and other features of the first driver 88, according to this embodiment, are further illustrated in FIGS. 5( a) to 5(d).

FIG. 5( a) is a perspective view that illustrates the proximal end 80 b of the second jaw 80. The proximal end 50 b of the first jaw 50 is shown in ghost lines. FIG. 5( a) illustrates the surgical device 11 in a fully open position. In this embodiment, the first driver 88 includes a rotating shaft 303. The first driver 88 also includes the horizontal driver element 301. A proximal end of the horizontal driver element 301 is engaged by the rotating shaft 303. A distal end of the horizontal driver element 301 includes an opening 3011. The first driver 88 also includes a first rotatable clamping element 302. The first rotatable clamping element 302 has a proximal end 3021, a middle portion 3022 and a distal end 3023.

The first driver 88 also includes a second rotatable clamping element 303. The second rotatable clamping element 303 has a proximal end 3032 and a distal end 3031. The proximal end of the first rotatable clamping element 302 is pivotably connected to the opening 3011 at the distal end of the horizontal driver element 301. The middle portion 3022 of the first rotatable clamping element 302 is pivotably connected to the proximal end 3032 of the second rotatable clamping element 303. The distal end 3021 of the first rotatable clamping element 302 is pivotably connected to the first jaw 50. The distal end 3031 of the second rotatable clamping element 303 is pivotably connected to the second jaw 50. Also, the proximal end 50 b of the first jaw 50 is pivotably connected to the proximal end 80 b of the second jaw 80 around pivot point A.

Upon engagement of the first driver 88, the surgical device 11 is moved into a first partially closed position, as illustrated in FIG. 5( b). Specifically, upon engagement of the first motor 96, the first drive shaft 94 causes rotation of the first drive socket 654 in a first direction. Rotation of the first drive socket 654 causes rotation of the rotating shaft 303 of the first driver 88, which in turn causes the horizontal driver element 301 to move in a distal direction. It should be recognized that the components of the first driver 88, while described in connection with this embodiment as including a rotating shaft 303, may include some or all of the components described in connection with the embodiment illustrated in FIG. 3( a) through 3(e) as set forth above, or else may include any other arrangement of components suitable for moving the horizontal driver element 301 in a distal direction driving.

Still referring to FIG. 5( b), distal movement of the horizontal driver element 301 causes rotation of the first rotatable clamping element 302, such that the distal end 3023 of the second rotatable clamping element 302 begins to move in a downward direction. The downward movement of the distal end 3023 of the second rotatable clamping element 302, by virtue of its pivotable attachment to the first jaw 50, causes the first jaw 50 to rotate relative to the second jaw 80 around pivot point A into the partially closed position.

Upon further engagement of the first driver 88, the surgical device 11 is moved into a second partially closed position, as illustrated in FIG. 5( c). Specifically, upon further engagement of the first motor 96, the horizontal driver element 301 is caused to move in a still further distal direction via the rotation of the first drive shaft 94, the first drive socket 654 and the rotating shaft 303 of the first driver 88. Continued distal movement of the horizontal driver element 301 causes further rotation of the first rotatable clamping element 302, such that the distal end 3023 of the second rotatable clamping element 302 continues to move in a downward direction. The continued downward movement of the distal end 3023 of the second rotatable clamping element 302, by virtue of its pivotable attachment to the first jaw 50, causes the first jaw 50 to rotate relative to the second jaw 80 around pivot point A into a nearly fully closed position.

Upon further engagement of the first driver 88, the surgical device 11 is moved into a fully closed position, as illustrated in FIG. 5( d). Specifically, upon still further engagement of the first motor 96, the horizontal driver element 301 is caused to move to a fully distal position via the rotation of the first drive shaft 94, the first drive socket 654 and the rotating shaft 303 of the first driver 88. In the fully distal position, the first rotatable clamping element 302 is fully rotated, such that the distal end 3023 of the first rotatable clamping element 302 is in a fully lowered position. In the fully lowered position, the distal end 3023 of the first rotatable clamping element 302 has moved the first jaw 50 around pivot point A to a fully closed position, such that a section of tissue 52 disposed between the first and second jaws 50, 80 is fully clamped between the first and second jaws 50, 80.

According to an example embodiment of the present invention, the surgical device 11 may be configured as an attachment to, or may be integral with, a purely mechanical device driver system, such as that illustrated in FIG. 1. In another embodiment, the surgical device 11 may be configured as an attachment to, or may be integral with, an electro-mechanical surgical system, such as an electro-mechanical driver system 1610 illustrated in FIG. 2( a).

Specifically, FIG. 2( a) is a perspective view of an example embodiment of an electro-mechanical driver component 1610 according to the present invention. Such an electro-mechanical surgical system is described in, e.g., U.S. patent application Ser. No. 09/723,715, filed on Nov. 28, 2000, now issued as U.S. Pat. No. 6,793,652 on Sep. 21, 2004, U.S. patent application Ser. No. 09/836,781, filed on Apr. 17, 2001, U.S. patent application Ser. No. 09/887,789, filed on Jun. 22, 2001 and U.S. patent application Ser. No. 10/099,634, filed on Mar. 15, 2002, each of which is expressly incorporated herein in their entirety by reference thereto. The electro-mechanical driver component 1610 may include, for example, a remote power console 1612, which includes a housing 1614 having a front panel 1615. Mounted on the front panel 1615 are a display device 1616 and indicators 1618 a, 1618 b. A flexible shaft 1620 may extend from the housing 1614 and may be detachably attached thereto via a first coupling 1622. The distal end 1624 of flexible shaft 1620 may include a second coupling 1626 adapted to detachably couple, e.g., the surgical device 11 described above, to the distal end 1624 of the flexible shaft 1620. The second coupling 1626 may also be adapted to detachably attach a different surgical instrument or attachment. In another example embodiment, the distal end 1624 of the flexible shaft 1620 may permanently attach to or be integral with a surgical instrument.

FIGS. 6( a) through 6(e) illustrate, according to one embodiment of the present invention, an arrangement of couplings and flexible shaft that may be employed in order to connect the surgical device 11 to the electro-mechanical drive component 1610. For instance, FIG. 6( a) illustrates a flexible shaft 2620 that extends from the housing 1614 that is detachably attached thereto via a first coupling 2622. The distal end 2624 of flexible shaft 2620 may include a second coupling 2626 adapted to detachably couple, e.g., the surgical device 11 described above, to the distal end 2624 of the flexible shaft 2620. FIG. 6( b) illustrates a rear perspective view of the first coupling 2622, according to one embodiment of the present invention. FIG. 6( c) illustrates a front perspective view of the first coupling 2622, according to the embodiment shown in FIG. 6( b). FIG. 6( d) is a side perspective view of some of the internal components of the first coupling 2622. FIG. 6( e) is a rear perspective view of the second coupling 2626 at the distal end 2624 of the flexible shaft 2620, according to one embodiment of the present invention. For the purposes of clarity, the flexible shaft 2620 is shown in FIG. 6( e) as ghost lines. Additional features of these components are further described in Applicant's co-pending patent application designated as.

While the combination of the flexible shaft 2620 and couplings 2622, 2626 provide one arrangement by which the surgical device 11 may be attached to the electro-mechanical power console 1610, any suitable arrangement may be employed. For instance, FIGS. 7 through 10 illustrate another arrangement by which the surgical device 11 may be attached to the electro-mechanical power console 1610. Referring to FIG. 7, there is seen a side view, partially in section, of the flexible shaft 1620. According to an example embodiment, the flexible shaft 1620 includes a tubular sheath 1628, which may include a coating or other sealing arrangement configured to provide a fluid-tight seal between the interior channel 1640 thereof and the environment. The sheath 1628 may be formed of a tissue-compatible, sterilizable elastomeric material. The sheath 1628 may also be formed of a material that is autoclavable. Disposed within the interior channel 1640 of the flexible shaft 1620, and extending along the entire length thereof, may be a first rotatable drive shaft 94, a second rotatable drive shaft 102, a first steering cable 1634, a second steering cable 1635, a third steering cable 1636, a fourth steering cable 1637 and a data transfer cable 1638. FIG. 8 is a cross-sectional view of the flexible shaft 1620 taken along the line 8-8 illustrated in FIG. 7 and further illustrates the several cables 94, 102, 1634, 1635, 1636, 1637 and 1638. Each distal end of the steering cables 1634, 1635, 1636, 1637 is affixed to the distal end 1624 of the flexible shaft 1620. Each of the several cables 94, 102, 1634, 1635, 1636, 1637, 1638 may be contained within a respective sheath.

The first rotatable drive shaft 94 and the second rotatable drive shaft 102 may be configured, for example, as highly flexible drive shafts, such as, for example, braided or helical drive cables. It should be understood that such highly flexible drive cables may have limited torque transmission characteristics and capabilities. It should also be understood that the surgical device 11, or other attachments connected to the flexible shaft 1620, may require a higher torque input than the torque transmittable by the drive shafts 94, 102. The drive shafts 94, 102 may thus be configured to transmit low torque but high speed, the high-speed/low-torque being converted to low-speed/high-torque by gearing arrangements disposed, for example, at the distal end and/or the proximal end of the drive flexible shaft 1620, in the surgical instrument or attachment and/or in the remote power console 1612. It should be appreciated that such gearing arrangement(s) may be provided at any suitable location along the power train between the motors disposed in the housing 1614 and the attached surgical instrument or other attachment connected to the flexible shaft 1620. Such gearing arrangement(s) may include, for example, a spur gear arrangement, a planetary gear arrangement, a harmonic gear arrangement, cycloidal drive arrangement, an epicyclic gear arrangement, etc.

Referring now to FIG. 9, there is seen a rear end view of first coupling 1622. The first coupling 1622 includes a first connector 1644, a second connector 1648, a third connector 1652 and a fourth connector 1656, each rotatably secured to the first coupling 1622. Each of the connectors 1644, 1648, 1652, 1656 includes a respective recess 1646, 1650, 1654, 1658. As illustrated in FIG. 9, each recess 1646, 1650, 1654, 1658 may be hexagonally shaped. It should be appreciated, however, that the recesses 1646, 1650, 1654, 1658 may have any shape and configuration adapted to non-rotatably couple and rigidly attach the connectors 1644, 1648, 1652, 1656 to respective drive shafts of the motor arrangement contained within the housing 1614. It should be appreciated that complementary projections may be provided on respective drive shafts of the motor arrangement to thereby drive the drive elements of the flexible shaft 1620. It should also be appreciated that the recesses may be provided on the drive shafts and complementary projections may be provided on the connectors 1644, 1648, 1652, 1656. Any other coupling arrangement configured to non-rotatably and releasably couple the connectors 1644, 1648, 1652, 1656 and the drive shafts of the motor arrangement may be provided.

One of the connectors 1644, 1648, 1652, 1656 is non-rotatably secured to the first drive shaft 94, and another one of the connectors 1644, 1648, 1652, 1656 is non-rotatably secured to the second drive shaft 102. The remaining two of the connectors 1644, 1648, 1652, 1656 engage with transmission elements configured to apply tensile forces on the steering cables 1634, 1635, 1636, 1637 to thereby steer the distal end 1624 of the flexible shaft 1620. The data transfer cable 1638 is electrically and logically connected with data connector 1660. The data connector 1660 includes, for example, electrical contacts 1662, corresponding to and equal in number to the number of individual wires contained in the data cable 1638. The first coupling 1622 includes a key structure 1642 configured to properly orient the first coupling 1622 to a mating and complementary coupling arrangement disposed on the housing 1612. The key structure 1642 may be provided on either one, or both, of the first coupling 1622 and the mating and complementary coupling arrangement disposed on the housing 1612. The first coupling 1622 may include a quick-connect type connector, which may engage the first coupling 1622 to the housing 1612 by a simple pushing motion. Seals may be provided in conjunction with any of the several connectors 1644, 1648, 1652, 1656, 1660 to provide a fluid-tight seal between the interior of first coupling 1622 and the environment.

Referring now to FIG. 10, there is seen a front end view of the second coupling 1626 of the flexible shaft 1620. In the example embodiment, the second coupling 1626 includes a first connector 1666 and a second connector 1668, each rotatably secured to the second coupling 1626 and each non-rotatably secured to a distal end of a respective one of the first and second drive shafts 94, 102. A quick-connect type fitting 1664 is provided on the second coupling 1626 to detachably secure the device 11 thereto. The quick-connect type fitting 1664 may be, for example, a rotary quick-connect type fitting, a bayonet type fitting, etc. and may be a fitting complementary to the quick connect sleeve 713 illustrated in FIG. 2( b). A key structure 1674 may be provided on the second coupling 1626 and may be configured to properly align the surgical device 11 to the second coupling 1626. The key structure or other arrangement configured to properly align the surgical device 11 to the flexible shaft 1620 may be provided on either one, or both, of the second coupling 1626 and the surgical device 11. In addition, the key structure may be provided on the device 11, as illustrated in FIG. 2( b) as the slots 713 a of the quick connect sleeve 713. A data connector 1670 having electrical contacts 1672 is also provided in the second coupling 1626. Like the data connector 1660 of first coupling 1622, the data connector 1670 of the second coupling 1626 includes contacts 1672 electrically and logically connected to the respective wires of the data transfer cable 1638 and the contacts 1662 of the data connector 1660. Seals may be provided in conjunction with the connectors 1666, 1668, 1670 to provide a fluid-tight seal between the interior of the second coupling 1626 and the environment.

Disposed within the housing 1614 of the remote power console 1612 are electro-mechanical driver elements configured to drive the drive shafts 94, 102 and the steering cables 1634, 1635, 1636, 1637 to thereby operate the electro-mechanical driver component 1610 and the surgical device 11 attached to the second coupling 1626. In the example embodiment illustrated schematically in FIG. 19, five electric motors 96, 100, 1684, 1690, 1696, each operated via a power source, may be disposed in the remote power console 1612. It should be appreciated, however, that any appropriate number of motors may be provided, and the motors may operate via battery power, line current, a DC power supply, an electronically controlled DC power supply, etc. It should also be appreciated that the motors may be connected to a DC power supply, which is in turn connected to line current and which supplies the operating current to the motors.

FIG. 11 illustrates schematically one possible arrangement of motors. An output shaft 1678 of a first motor 96 engages with the first connector 1644 of the first coupling 1622 when the first coupling 1622, and, therefore, the flexible shaft 1620, is engaged with the housing 1614 to thereby drive the first drive shaft 94 and the first connector 1666 of the second coupling 1626. Similarly, an output shaft 1682 of a second motor 100 engages the second connector 1648 of the first coupling 1622 when the first coupling 1622, and, therefore, flexible shaft 1620 is engaged with the housing 1614 to thereby drive the second drive shaft 102 and the second connector 1668 of the second coupling 1626. An output shaft 1686 of a third motor 1684 engages the third connector 1652 of the first coupling 1622 when the first coupling 1622, and, therefore, the flexible shaft 1620, is engaged with the housing 1614 to thereby drive the first and second steering cables 1634, 1635 via a first pulley arrangement 1688. An output shaft 1692 of a fourth motor 1690 engages the fourth connector 1656 of the first coupling 1622 when the first coupling 1622, and, therefore, the flexible shaft 1620, is engaged with the housing 1614 to thereby drive the third and fourth steering cables 1636, 1637 via a second pulley arrangement 1694. The third and fourth motors 1684, 1690 may be secured on a carnage 1100, which is selectively movable via an output shaft 1698 of a fifth motor 1696 between a first position and a second position to selectively engage and disengage the third and fourth motors 1684, 1690 with the respective pulley arrangement 1688, 1694 to thereby permit the flexible shaft 1620 to become taut and steerable or limp as necessary. It should be appreciated that other mechanical, electrical and/or electro-mechanical mechanisms, etc., may be used to selectively engage and disengage the steering mechanism. The motors may be arranged and configured as described, for example, in U.S. patent application Ser. No. 09/510,923, entitled “A Carriage Assembly for Controlling a Steering Wire. Mechanism Within a Flexible Shaft,” which is expressly incorporated herein in its entirety by reference thereto. It should also be appreciated that, in accordance with other embodiments of the present invention, the steering mechanism may not be present at all, the surgical device 11 providing articulation between the jaw portion 11 a and the shaft portion 11 b so as to maneuver the surgical device 11 within a surgical site.

It should be appreciated that any one or more of the motors 96, 100, 1684, 1690, 1696 may be, for example, a high-speed/low-torque motor, a low-speed/high-torque motor, etc. As indicated above, the first rotatable drive shaft 94 and the second rotatable drive shaft 102 may be configured to transmit high speed and low torque. Thus, the first motor 96 and the second motor 100 may be configured as high-speed/low-torque motors. Alternatively, the first motor 96 and the second motor 100 may be configured as low-speed/high-torque motors with a torque-reducing/speed-increasing gear arrangement disposed between the first motor 96 and the second motor 100 and a respective one of the first rotatable drive shaft 94 and the second rotatable drive shaft 102. Such torque-reducing/speed-increasing gear arrangements may include, for example, a spur gear arrangement, a planetary gear arrangement, a harmonic gear arrangement, cycloidal drive arrangement, an epicyclic gear arrangement, etc. It should be appreciated that any such gear arrangement may be disposed within the remote power console 1612 or in the proximal end of the flexible shaft 1620, such as, for example, in the first coupling 1622. It should be appreciated that the gear arrangement(s) may be provided at the distal and/or proximal ends of the first rotatable drive shaft 94 and/or the second rotatable drive shaft 102 to prevent windup and breakage thereof.

Referring now to FIG. 12, there is seen a schematic view of the electro-mechanical driver component 1610. A controller 1122 is provided in the housing 1614 of remote power console 1612 and is configured to control all functions and operations of the electro-mechanical driver component 1610 and the linear clamping, cutting and stapling device 11 or other surgical instrument or attachment attached to the flexible shaft 1620. A memory unit 1130 is provided and may include memory devices, such as, a ROM component 1132, a RAM component 1134, etc. The ROM component 1132 is in electrical and logical communication with the controller 1122 via a line 1136, and the RAM component 1134 is in electrical and logical communication with controller 1122 via line 1138. The RAM component 1134 may include any type of random-access memory, such as, for example, a magnetic memory device, an optical memory device, a magneto-optical memory device, an electronic memory device, etc. Similarly, the ROM component 1132 may include any type of read-only memory, such as, for example, a removable memory device, such as a PC-Card or PCMCIA-type device. It should be appreciated that the ROM component 1132 and the RAM component 1134 may be configured as a single unit or may be separate units and that the ROM component 1132 and/or the RAM component 1134 may be provided in the form of a PC-Card or PCMCIA-type device.

The controller 1122 is further connected to the front panel 1615 of the housing 1614 and, more particularly, to the display device 1616 via a line 1154 and the indicators 1618 a, 1618 b via respective lines 1156, 1158. The lines 1116, 1118, 1124, 1126, 1128 electrically and logically connect controller 1122 to first, second, third, fourth and fifth motors 96, 100, 1684, 1690, 1696, respectively. A wired remote control unit (“RCU”) 1150 is electrically and logically connected to the controller 1122 via a line 1152. A wireless RCU 1148 is also provided and communicates via a wireless link 1160 with a receiving/sending unit 1146 connected via a line 1144 to a transceiver 1140. The transceiver 1140 is electrically and logically connected to the controller 1122 via a line 1142. The wireless link 1160 may be, for example, an optical link, such as an infrared link, a radio link or any other form of wireless communication link.

A switch device 1186, which may include, for example, an array of DIP switches, may be connected to the controller 1122 via a line 1188. The switch device 1186 may be configured, for example, to select one of a plurality of languages used in displaying messages and prompts on the display device 1616. The messages and prompts may relate to, for example, the operation and/or the status of the electro-mechanical driver component 1610 and/or to the surgical device 11 attached thereto.

According to the example embodiment of the present invention, a first encoder 1106 is provided within the second coupling 1626 and is configured to output a signal in response to and in accordance with the rotation of the first drive shaft 94. A second encoder 1108 is also provided within the second coupling 626 and is configured to output a signal in response to and in accordance with the rotation of the second drive shaft 102. The signal output by each of the encoders 1106, 1108 may represent the rotational position of the respective drive shaft 94, 102 as well as the rotational direction thereof. These encodes may be an arrangement of light sources, e.g., LEDs, and optical fibers as illustrated for instance in FIG. 6( e). Alternatively, such encoders 1106, 1108 may include, for example, Hall-effect devices, optical devices, etc. Although the encoders 1106, 1108 are described as being disposed within the second coupling 1626, it should be appreciated that the encoders 1106, 1108 may be provided at any location between the motor system and the surgical device 11. It should be appreciated that providing the encoders 1106, 1108 within the second coupling 1626 or at the distal end of the flexible shaft 1620 may provide an accurate determination of the drive shaft rotation. If the encoders 1106, 1108 are disposed at the proximal end of the flexible shaft 1620, windup of the first and second rotatable drive shafts 94, 102 may result in measurement error.

FIG. 13 is a schematic view of an encoder 1106, 1108, which includes a Hall-effect device. Mounted non-rotatably on the drive shaft 94, 102 is a magnet 1240 having a north pole 1242 and a south pole 1244. The encoder 1106, 1108 further includes a first sensor 1246 and second sensor 1248, which are disposed approximately 90° apart relative to the longitudinal, or rotational, axis of the drive shaft 94, 102. The output of the sensors 1246, 1248 is persistent and changes its state as a function of a change of polarity of the magnetic field in the detection range of the sensor. Thus, based on the output signal from the encoders 1106, 1108, the angular position of the drive shaft 94, 102 may be determined within one-quarter revolution and the direction of rotation of the drive shaft 94, 102 may be determined. The output of each encoder 1106, 1108 is transmitted via a respective line 1110, 1112 of data transfer cable 1638 to controller 1122. The controller 1122, by tracking the angular position and rotational direction of the drive shafts 94, 102 based on the output signal from the encoders 1106, 1108, may thereby determine the position and/or state of the components of the surgical device connected to the electro-mechanical driver component 1610. That is, by counting the revolutions of the drive shaft 94, 102, the controller 1122 may determine the position and/or state of the components of the surgical device connected to the electro-mechanical driver component 1610.

For example, the advancement distance of the first jaw 50 relative to the second jaw 80 and of the wedge 603 may be functions of, and ascertainable on the basis of, the rotation of the respective drive shafts 94, 102. By ascertaining an absolute position of the first jaw 50 and the wedge 603 at a point in time, the relative displacement of the first jaw 50 and the wedge 603, based on the output signal from the encoders 1106, 1108 and the known pitches of the threaded screw 520 and of the wedge driver 605, may be used to ascertain the absolute position of the first jaw 50 and the wedge 603 at all times thereafter. The absolute position of the first jaw 50 and the wedge 603 may be fixed and ascertained at the time that the surgical device 11 is first coupled to the flexible shaft 1620. Alternatively, the position of the first jaw 50 and the wedge 603 relative to, for example, the second jaw 80 may be determined based on the output signal from the encoders 1106, 1108.

As discussed above in connection with FIGS. 2( b) and 10, the surgical device 11 may include a data connector 1272 adapted by size and configuration to electrically and logically connect to connector 1670 of second coupling 1626. In the example embodiment, the data connector 1272 includes contacts 1276 equal in number to the number of contacts 1672 of connector 1670. The memory module 6041 is electrically and logically connected with the data connector 1272. Memory module 6041 may be in the form of, for example, an EEPROM, EPROM, etc. and may be contained, for example, within the staple tray 604 of the replaceable staple cartridge 600 in the second jaw 80 of the surgical device 11, as illustrated in FIG. 3( f).

FIG. 14 schematically illustrates the memory module 6041. As seen in FIG. 14, data connector 1272 includes contacts 1276, each electrically and logically connected to the memory module 6041 via a respective line, e.g., flexible data cable 1278. The memory module 6041 may be configured to store, for example, a serial number data 1180, an attachment type identifier (ID) data 1182 and a usage data 1184. The memory module 6041 may additionally store other data. Both the serial number data 1180 and the ID data 1182 may be configured as read-only data. The serial number data 1180 and/or the ID data 1182 may be stored in a read-only section of the memory module 6041. In the example embodiment, serial number data 1180 may be data uniquely identifying the particular surgical device, whereas the ID data 1182 may be data identifying the type of the attachment, such as, e.g., for an electro-mechanical driver component 1610 to which other types of surgical instruments or attachments are attachable. The usage data 1184 represents usage of the particular attachment, such as, for example, the number of times the first jaw 50 of the surgical device 11 has been opened and closed, or the number of times that the wedge 603 of the surgical device 11 has been advanced. The usage data 1184 may be stored in a read/write section of the memory module 6041.

It should be appreciated that the attachment attachable to the distal end 1624 of the flexible shaft 1620, e.g., surgical device 11, may be designed and configured to be used a single time or multiple times. The attachment may also be designed and configured to be used a predetermined number of times. Accordingly, the usage data 1184 may be used to determine whether the surgical device 11 has been used and whether the number of uses has exceeded the maximum number of permitted uses. As more fully described below, an attempt to use the attachment after the maximum number of permitted uses has been reached will generate an ERROR condition.

Referring again to FIG. 12, the controller 1122 is configured to read the ID data 1182 from the memory module 6041 of the surgical device 11 when the surgical device 11 is initially connected to the flexible shaft 1620. The memory module 6041 is electrically and logically connected to the controller 1122 via the line 1120 of the data transfer cable 1638. Based on the read ID data 1182, the controller 1122 is configured to read or select from the memory unit 1130, an operating program or algorithm corresponding to the type of surgical instrument or attachment connected to the flexible shaft 1620. The memory unit 1130 is configured to store the operating programs or algorithms for each available type of surgical instrument or attachment, the controller 1122 selecting and/or reading the operating program or algorithm from the memory unit 1130 in accordance with the ID data 1182 read from the memory module 6041 of an attached surgical instrument or attachment. As indicated above, the memory unit 1130 may include a removable ROM component 1132 and/or RAM component 1134. Thus, the operating programs or algorithms stored in the memory unit 1130 may be updated, added, deleted, improved or otherwise revised as necessary. The operating programs or algorithms stored in the memory unit 1130 may be customizable based on, for example, specialized needs of the user. A data entry device, such as, for example, a keyboard, a mouse, a pointing device, a touch screen, etc., may be connected to the memory unit 1130 via, for example, a data connector port, to facilitate the customization of the operating programs or algorithms. Alternatively or additionally, the operating programs or algorithms may be customized and preprogrammed into the memory unit 1130 remotely from the electro-mechanical driver component 1610. It should be appreciated that the serial number data 1180 and/or usage data 1184 may also be used to determine which of a plurality of operating programs or algorithms is read or selected from the memory unit 1130. It should be appreciated that the operating program or algorithm may alternatively be stored in the memory module 6041 of the surgical device 11 and transferred to the controller 1122 via the data transfer cable 1638. Once the appropriate operating program or algorithm is read by or selected by or transmitted to, the controller 1122, the controller 1122 causes the operating program or algorithm to be executed in accordance with operations performed by the user via the wired RCU 1150 and/or the wireless RCU 1148. As indicated hereinabove, the controller 1122 is electrically and logically connected with the first, second, third, fourth and fifth motors 96, 100, 1684, 1690, 1696 via respective lines 1116, 1118, 1124, 1126, 1128 and is configured to control such motors 96, 100, 1684, 1690, 1696 in accordance with the read, selected or transmitted operating program or algorithm via the respective lines 1116, 1118, 1124, 1126, 1128.

Referring now to FIG. 15, there is seen a schematic view of wireless RCU 1148. Wireless RCU 1148 includes a steering controller 1300 having a plurality of switches 1302, 1304, 1306, 1308 arranged under a four-way rocker 1310. The operation of switches 1302, 1304, via rocker 1310, controls the operation of first and second steering cables 1634, 1635 via third motor 1684. Similarly, the operation of switches 1306, 1308, via rocker 1310, controls the operation of third and fourth steering cables 1636, 1637 via fourth motor 1692. It should be appreciated that rocker 1310 and switches 1302, 1304, 1306, 1308 are arranged so that the operation of switches 1302, 1304 steers the flexible shaft 1620 in the north-south direction and that the operation of switches 1306, 1308 steers the flexible shaft 1620 in the east-west direction. Reference herein to north, south, east and west is made to a relative coordinate system. Alternatively, a digital joystick, an analog joystick, etc. may be provided in place of rocker 1310 and switches 1302, 1304, 1306, 1308. Potentiometers or any other type of actuator may also be used in place of switches 1302, 1304, 1306, 1308.

The wireless RCU 1148 further includes a steering engage/disengage switch 1312, the operation of which controls the operation of fifth motor 696 to selectively engage and disengage the steering mechanism. The wireless RCU 1148 also includes a two-way rocker 1314 having first and second switches 1316, 1318 operable thereby. The operation of these switches 1316, 1318 controls certain functions of the electro-mechanical driver component 1610 and any surgical instrument or attachment, such as the surgical device 11, attached to the flexible shaft 1620 in accordance with the operating program or algorithm corresponding to the attached device. For example, operation of the two-way rocker 1314 may control the opening and closing of the first jaw 50 and the second jaw 80 of the surgical device 11. The wireless RCU 1148 is provided with yet another switch 1320, the operation of which may further control the operation of the electro-mechanical driver component 1610 and the device attached to the flexible shaft 1620 in accordance with the operating program or algorithm corresponding to the attached device. For example, operation of the switch 1320 may initiate the advancement of the wedge 603 of the surgical device 11.

The wireless RCU 1148 includes a controller 1322, which is electrically and logically connected with the switches 1302, 1304, 1306, 1308 via line 1324, with the switches 1316, 1318 via line 1326, with switch 1312 via line 1328 and with switch 1320 via line 1330. The wireless RCU 1148 may include indicators 1618 a′, 1618 b′, corresponding to the indicators 1618 a, 1618 b of front panel 1615, and a display device 1616′, corresponding to the display device 1616 of the front panel 1615. If provided, the indicators 1618 a′, 1618 b′ are electrically and logically connected to controller 1322 via respective lines 1332, 1334, and the display device 1616′ is electrically and logically connected to controller 1322 via line 1336. The controller 1322 is electrically and logically connected to a transceiver 1338 via line 1340, and the transceiver 1338 is electrically and logically connected to a receiver/transmitter 1342 via line 1344. A power supply, for example, a battery, may be provided in wireless RCU 1146 to power the same. Thus, the wireless RCU 1148 may be used to control the operation of the electro-mechanical driver component 1610 and the device 11 attached to the flexible shaft 1620 via wireless link 1160.

The wireless RCU 1148 may include a switch 1346 connected to a controller 1322 via line 1348. Operation of the switch 1346 transmits a data signal to the transmitter/receiver 1146 via wireless link 1160. The data signal includes identification data uniquely identifying the wireless RCU 1148. This identification data is used by the controller 1122 to prevent unauthorized operation of the electro-mechanical driver component 1610 and to prevent interference with the operation of the electro-mechanical driver component 610 by another wireless RCU. Each subsequent communication between the wireless RCU 1148 and the electro-mechanical device surgical 610 may include the identification data. Thus, the controller 1122 may discriminate between wireless RCUs and thereby allow only a single, identifiable wireless RCU 1148 to control the operation of the electro-mechanical driver component 1610 and the surgical device 11 attached to the flexible shaft 1620.

Based on the positions of the components of the surgical device attached to the flexible shaft 1620, as determined in accordance with the output signals from the encoders 1106, 1108, the controller 1122 may selectively enable or disable the functions of the electro-mechanical driver component 1610 as defined by the operating program or algorithm corresponding to the attached device. For example, for the surgical device 11, the firing function controlled by the operation of the switch 1320 may be disabled unless the space or gap between the first jaw 50 and the second jaw 80 is determined to be within an acceptable range.

Referring now to FIG. 16, there is seen a schematic view of a wired RCU 1150. In the example embodiment, wired RCU 1150 includes substantially the same control elements as the wireless RCU 1148 and further description of such elements is omitted. Like elements are indicated in FIG. 16 with an accompanying prime. It should be appreciated that the functions of the electro-mechanical driver component 1610 and the device attached to the flexible shaft 1620, e.g., the surgical device 11, may be controlled by the wired RCU 1150 and/or by the wireless RCU 1148. In the event of a battery failure, for example, in the wireless RCU 1148, the wired RCU 1150 may be used to control the functions of the electro-mechanical driver component 1610 and the device attached to the flexible shaft 1620.

As described hereinabove, the front panel 1615 of the housing 1614 includes the display device 1616 and the indicators 1618 a, 1618 b. The display device 1616 may include an alpha-numeric display device, such as an LCD display device. The display device 1616 may also include an audio output device, such as a speaker, a buzzer, etc. The display device 1616 is operated and controlled by controller 1122 in accordance with the operating program or algorithm corresponding to the device attached to the flexible shaft 1620, e.g., the surgical device 11. If no surgical instrument or attachment is so attached, a default operating program or algorithm may be read by or selected by or transmitted to controller 1122 to thereby control the operation of the display device 1616 as well as the other aspects and functions of the electro-mechanical driver component 1610. If the surgical device 11 is attached to the flexible shaft 1620, the display device 1616 may display, for example, data indicative of the gap between the first jaw 50 and the second jaw 80 as determined in accordance with the output signal of encoders 1106, 1108, as more fully described hereinabove.

Similarly, the indicators 1618 a, 1618 b are operated and controlled by the controller 1122 in accordance with the operating program or algorithm corresponding to the device attached to the flexible shaft 1620, e.g., the surgical device 11. The indicator 1618 a and/or the indicator 1618 b may include an audio output device, such as a speaker, a buzzer, etc., and/or a visual indicator device, such as an LED, a lamp, a light, etc. If the surgical device 11 is attached to the flexible shaft 1620, the indicator 1618 a may indicate, for example, that the electro-mechanical driver component 1610 is in a power ON state, and the indicator 618 b may, for example, indicate whether the gap between the first jaw 50 and the second jaw 80 is determined to be within the acceptable range. It should be appreciated that although two indicators 1618 a, 1618 b are described, any number of additional indicators may be provided as necessary. Additionally, it should be appreciated that although a single display device 1616 is described, any number of additional display devices may be provided as necessary.

The display device 1616′ and the indicators 1618 a′, 1618 b′ of wired RCU 1150 and the display device 1616″ and indicators 1618 a″, 1618 b″ of the wireless RCU 1148 are similarly operated and controlled by respective controller 1322, 1322′ in accordance with the operating program or algorithm of the device attached to the flexible shaft 1620.

As set forth above, one problem with conventional surgical devices, and in particular with the conventional linear clamping, cutting and stapling devices such as that illustrated in FIG. 1, is that the opposing jaws may be difficult to maneuver within a patient. It may be necessary for a surgeon to move the opposing jaws between various angles in order to position the desired tissue between the opposing jaws. However, it may also be desirable to make an incision in a patient that is as small as possible, and the small size of an incision limits the degree to which the opposing jaws may be maneuvered. Example embodiments of the present invention may provide improved maneuverability of a surgical device, e.g., the surgical device 11, within a patient.

Another problem with the conventional surgical devices, and in particular with the foregoing linear clamping, cutting and stapling devices such as that illustrated in FIG. 1, is that the opposing jaws may not be sufficiently hemostatic. Specifically, the opposing jaws of the foregoing surgical devices may not be clamped together with sufficient force, thereby reducing the effectiveness of the surgical device. Example embodiments of the present invention may provide improved clamping of a section of tissue disposed between the jaws of a surgical device, e.g., the surgical device 11, thereby providing a sufficiently hemostatic condition with respect to the clamped section of tissue.

Furthermore, and as previously mentioned, one problem of conventional cutting and stapling devices is that the opposing jaws of the mechanism may not adequately clamp a section of tissue clamped therebetween, and they may not prevent a section of tissue clamped therebetween from escaping out from between the distal ends of the jaws during the operation of the device. This follows because the scissor-type gripping elements of conventional clamping, cutting and stapling devices, such as the device illustrated in FIG. 1, pivot relative to each other around a fixed pivot point at a proximal end of the gripping elements. Thus, since the distance between the gripping elements is always less at a proximal end of the gripping elements than at the distal ends of the gripping elements, the clamping force on a section of tissue disposed between the gripping elements is greatest near the proximal ends of the gripping elements and gradually decreases in the distal direction. The relatively high clamping force at the proximal ends of the gripping elements coupled with the relatively low clamping force at the distal ends of the gripping elements causes the section of tissue to be pushed towards, and eventually out from between, the distal ends of the gripping elements. Thus, the section of tissue may not be adequately cut and stapled, and the inadequately cut and stapled end of the tissue may permit its contents to spill into the open abdomen of the patient, increasing the likelihood of infection and other complications.

In contrast, and as previously described in detail in connection with FIGS. 3( i) to 3(l), the surgical device 11 may provide an arrangement in which the distal ends 50 a, 80 a of the first and second jaws 50, 80 are urged towards each other during the operation of the surgical device 11, such that the clamping force between the distal ends 50 a, 80 a of the first and second jaws 50, 80 is greater in the surgical device 11 than the clamping force between the distal ends of the jaws of a conventional clamping, cutting and stapling device. The increased clamping force at the distal ends 50 a, 80 a of the first and second jaws 50, 80 may prevent a section of tissue which is disposed between the first and second jaws 50, 80 from escaping out from between the distal ends 50 a, 80 a of the first and second jaws 50, 80.

Those skilled in the art will appreciate that numerous modifications of the exemplary embodiment described hereinabove may be made without departing from the spirit and scope of the present invention. Although exemplary embodiments of the present invention have been described and disclosed in detail herein, it should be understood that this invention is in no sense limited thereby. 

What is claimed is:
 1. A surgical device, comprising: a jaw portion including a first jaw and a second jaw moveable relative to the first jaw, wherein the jaw portion includes a first longitudinal axis extending between a proximal end of the jaw portion and a distal end of the jaw portion; a shaft portion coupled to the proximal end of the jaw portion, wherein the shaft portion defines a second longitudinal axis; and a gear assembly coupled to the jaw portion, the gear assembly including a first gear element configured to cause at least a portion of the jaw portion to rotate relative to the shaft portion about the first longitudinal axis, the gear assembly including a second gear element being configured to cause the jaw portion to pivot relative to the shaft portion about a pivot axis that is perpendicular to the second longitudinal axis.
 2. The device of claim 1, wherein the second gear element is configured to rotate about the pivot axis.
 3. The device of claim 1, wherein the gear assembly is further configured to move the first and second jaws relative to each other.
 4. The device of claim 1, wherein the pivot axis is perpendicular to the first longitudinal axis.
 5. The device of claim 4, wherein the first and second jaws are moveable relative to each other in a plane, the pivot axis being arranged parallel to the plane.
 6. The device of claim 5, wherein the gear assembly is adapted to be driven by a first rotatable drive shaft and a second rotatable drive shaft.
 7. The device of claim 6, wherein the gear assembly is configured such that rotation of the first and second rotatable drive shafts in opposite directions relative to each other causes the jaw portion to pivot relative to the shaft portion about the pivot axis.
 8. The device of claim 6, wherein the first gear element is configured to be rotated by the first and second rotatable drive shafts in a same direction relative to each other to cause the at least a portion of the jaw portion to rotate relative to the shaft portion about the first longitudinal axis.
 9. The device of claim 6, further comprising a surgical member disposed within the first jaw, the surgical member comprising at least one of a cutting element and a stapling element.
 10. The device of claim 9, wherein the gear assembly is configured to be actuated by the first rotatable drive shaft without rotation of the second rotatable drive shaft to cause at least one of relative movement of the first jaw and the second jaw and relative movement of the surgical member within the first jaw.
 11. A surgical device, comprising: a jaw portion including a first jaw and a second jaw moveable relative to the first jaw, wherein the jaw portion includes a first longitudinal axis extending between a proximal end of the jaw portion and a distal end of the jaw portion; a surgical member disposed within the first jaw, the surgical member comprising at least one of a cutting element or a stapling element; a shaft portion coupled to the proximal end of the jaw portion, wherein the shaft portion defines a second longitudinal axis; and a gear assembly coupled to the jaw portion, the gear assembly including a first gear element configured to cause at least a portion of the jaw portion to rotate relative to the shaft portion about the first longitudinal axis, the gear assembly including a second gear element being configured to cause the jaw portion to pivot relative to the shaft portion about a pivot axis that is perpendicular to the second longitudinal axis, the gear assembly being configured to cause at least one of relative movement of the first jaw and the second jaw and relative movement of the surgical member within the first jaw.
 12. The device of claim 11, wherein the gear assembly is adapted to be driven by a first rotatable drive shaft and a second rotatable drive shaft.
 13. The device of claim 12, wherein the gear assembly is configured such that rotation of the first and second rotatable drive shafts in opposite directions relative to each other causes the jaw portion to pivot relative to the shaft portion about the pivot axis.
 14. The device of claim 13, wherein the first rotatable drive shaft is configured to rotate in a first direction and the second rotatable drive shaft is configured to rotate in a second direction opposite to the first direction to effect pivoting of the jaw portion relative to the shaft portion in a first pivot direction about the pivot axis, and wherein the first rotatable drive shaft is configured to rotate in the second direction and the second rotatable drive shaft is configured to rotate in the first direction to effect pivoting of the jaw portion relative to the shaft portion in a second pivot direction opposite the first pivot direction about the pivot axis.
 15. The device of claim 12, wherein the first gear element is configured to be rotated by the first and second rotatable drive shafts in a same direction relative to each other to cause the at least a portion of the jaw portion to rotate relative to the shaft portion about the first longitudinal axis.
 16. The device of claim 15, wherein the first and second rotatable drive shafts are configured to rotate in a first direction to effect rotation of the at least a portion of the jaw portion relative to the shaft portion in a first rotation direction about the first longitudinal axis, and wherein the first and second rotatable drive shafts are configured to rotate in a second direction opposite the first direction to effect rotation of the at least a portion of the jaw portion relative to the shaft portion in a second rotation direction opposite the first rotation direction about the first longitudinal axis.
 17. The device of claim 12, wherein the gear assembly is configured to be actuated by the first rotatable drive shaft without rotation of the second rotatable drive shaft to cause at least one of relative movement of the first jaw and the second jaw and relative movement of the surgical member within the first jaw.
 18. The device of claim 17, wherein the first rotatable drive shaft is configured to rotate in a first direction and the second rotatable drive shaft is configured to not rotate to effect opening of the first jaw relative to the second jaw, and wherein the first rotatable drive shaft is configured to rotate in a second direction opposite the first direction and the second rotatable drive shaft is configured to not rotate to effect closing of the first jaw relative to the second jaw.
 19. The device of claim 17, wherein the second rotatable drive shaft is configured to rotate in a first direction and the first rotatable drive shaft is configured to not rotate to extend the surgical member, and wherein the second rotatable drive shaft is configured to rotate in a second direction opposite the first direction and the first rotatable drive shaft is configured to not rotate to retract the surgical member. 